Out of survival Euell Gibbons supplement the family diet with wild foods. He was only a teenager while doing so. He went on writing about these foods [e.g.: Stalking the Wild Asparagus (1962)] and many more books in this genre and was a huge supporter of Natural Diets in the 60’s.
Research has shown that Wild Foods is not only healthy but also provide a magnitude on nutrients not often found in the isles of grocery stores.
Read more about Wild Foods Day: http://www.cooksinfo.com/wild-foods-day
and Euell Gibbons: https://en.wikipedia.org/wiki/Euell_Gibbons